Effects of Synthesis Temperature on the Microstructure and Thermoelectric Properties of Te-Se Codoped Skutterudites
Effects of Synthesis Temperature on the Microstructure and Thermoelectric Properties of Te-Se Codoped Skutterudites
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DOI：
10.1007/s11664-013-2824-4
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发表时间：
2014-06
影响因子：
2.1
通讯作者：
Shijie Ding;Bo Duan;Chenglong Xu;Y. Li;Lisheng Liu;P. Zhai
中科院分区：
文献类型：
--
作者：
Shijie Ding;Bo Duan;Chenglong Xu;Y. Li;Lisheng Liu;P. Zhai
Skutterudite compounds Co4Sb11.3Te0.5Se0.2were synthesized by solid-state reaction at different temperatures (853 K, 903 K, 953 K, and 1003 K) with subsequent spark plasma sintering. x-Ray diffraction, field-emission scanning electron microscopy, and electron probe microanalysis were utilized to analyze the phase structure, microstructure, and actual compositions of the samples. The results showed that the actual composition and the grain size vary with the synthesis temperature. The thermoelectric properties of all samples were measured in the temperature range of 300 K to 800 K. As the synthesis temperature increases, the electrical conductivity increases rapidly, the absolute Seebeck coefficient falls, and the thermal conductivity first decreases and then increases. The highest dimensionless figure of meritZTwas achieved for the sample synthesized at 953 K, exceeding 1.0 at high temperature.
